Chuck



June 7 1927- J, F. MoReAL CHUCK Eiled July 13. 1922 JOHN k MOPGAL.

vFig.4

Patented June 7," 1927'.

1 JoHN'r. MORGA'IL, or sriamerrntn, onio. Y

" fonnoiz;

" A lication filed July s,

" This "invention" relates to chucks for hold ing piston "rings and the"like while wo'rle is being performed thereon,- f 7 l piston ring susually; cast'and a portion offth e ring cutaway'fto forinl an openingtherein so that when compressed the ring v'v illhavea tendencyto"eXpa:nd. The ring 'i's'then compressedto'c lose thefope'ning and iffinished to true circi i-lar forni;' w a V Thepurpose ofthepresent'invention is-to provide a device by ineans' of'jwhi'ch the ringmay be compressed to close the saine and then'held ri gidly in itsclosed position dur ing the finishing thereof and more particui5 lai'lyduring the finishing of cthe ihner ,sur

faceLthereofi e V I {A further ohjectzof the inventionis to provide adevice of this kind having'rneans for first closing therring and thenclamping 20, the same to hold it againjstniovern'ent rela tively to thedevice as aZ Whole; u further object ,Of the inventioiris to providesuch adevice which will befsiinp'l'e can be" quickly and easilyoperated, ,1 Other objects ofthe inventionni'ay appear 21 131181 deviceis described in detail, I p In the accompanying d1 wings.; F ig. l isa-"fro nt elevation of a chuck einbodyingniy invention with one of thejavvs in section; Fig.2 is a longitudinal sectional view'taken centrallythereof and partly in-elevation; Fig.3 isjja sectional detail View oftheactuatingiplate' for the jaws; and Fig. '4 is a side elevationshowingthe chuck mounted oila lathe' 'lntheseldrawingsl have illustratedone embodiment of m invention and have s'l'iown the i same as comprisinga plurality of jaws for compressinglthe ring to close the opening and ashaving clamping members to engage the ring after "it "has been" con1-pressed andv hold it against all nioveinent relatively to the'chuck as aWhole. It will be understood, however, that this particular form of thedevice has been chosen for the purpose of chuckniay take various formsand may be used in connection with vanious articles, other than pistonrings, Without departing from the spirit of my invention.

In that form of the device hereshown the chuck comprisesa bod portion 1which forms the support for thejaws andis-here shown as acircular in itsconstruction 'an'doperation and which illustrationyon'ly and that themay adjust itself relatively thereto during plate-having a reduced1922." Seria1No.574 ,793i-1 rear portion EZ toyiv hich isgri gidly'secured a hub 3 having a atl'angeae, the-peripheryiof whichpreterahlylegrtends ashortjdistance 'heyond' the periphery of thereduced tron? 2. 0t 'theris'upporting structure: This 0.:

hub, here-shown,- is provided with internalwscrew threads 5 by:ineansof:whichvit may be attached to a: spindle G' whichisin the;present instance hollow Movably mounted on the body portion, orsupporting structure, 1, are a plurality ofjaws' 7 which arepreferahly'rnounted for r'aijdialmovernent' vrelatively to thesupporting structureand" v .w hich,"inlthe present forinof the devicejare r sector-like in shape. Eaohjaw has a part adapted to engage theouter periphery of 1 the ring so that-when thefseve-ralj-avvsfia-removed one toward the other the ring will be compressed and theopeningtherein closed:

.The jaw-s may be mounted on th'e'sup ort-' in'g structure in various.ways, but as 'ie're shown, each aw has rigidly seclired' 'theretp aguide block 8 whichfiis s'lidabl'y mounted r i in a guidewa'y 9 torm'edin'jthe supporting structure and extending radially thereof; 8Q

Anyfsuitable "means "may-be provided for moving the jaws relatively tothe supporting structure but; it j is desiralelejthat they should be'nio-ved simultaneously and to the {s me eXftent-so that'jthe; samepressure willhe ap-' 8 plied to the ring at-its po-i-nt o'fi contactwith each" ja'vv.-"I' liave', therefor-cf; shown the guideblocks 8' ashaving rearwardly'extending' proj'ec'ti'ons, or teeth, 10 adapted toengage threads,-o'r spiral grooves, '11 formed in the inner face'of anadjusting plate 12 re tatably rnountedon the supporting structure. Ashere show-n,'this plate is-in the form'ot a wide ring'rotatahlymountedupon ftfhe reduced portion '2 of-gth'e supporting struc ture' betweenthe forward portion 'of" the sarne and the fian'g'e 40f the'hub 3,111;will be apparent, therefor-e, that the rotation of the adjusting platewill iinzpart radial ino-vev Il ent to the jaws; j The jaws niayhaveany-suitable shape but, as here shown, the inner portion of eachsector'is cut away so thatt-hehiiter portions 1 1 of the several sectorswill fornibetween' thein' a cavity, or recess, 13 to receive the ring, 1which is shown; at l l, It is desirable that the aws should havenarrowpoints of contact with the ring in order thatthellatter the closingoperation. For this purpose and- .to facilitate the movement of the ringrelatively to the jaws,fI have mounted in the outer portion of each jawa roller 15, the

peripheries of'which project beyondthe inv 'ner surfaces of saidportions of said jaws and constitute the contact portions of the.

jaws. Preferably each jaw is provided with 'a slot, or recess, 16 in.which the roller is" t ar mounted.

In order to properly aline' the ring after it has-been closed andttohold the same against movement while work is being performed thereon,asuitable holding, or clamping, device is provided and, adapted to gripthe ring after'it has been closed. As

- here shown,;the outer portionofeachsecton like jaw has an inwardlyextending flange 17 arranged'ini front of its roller and adapted I a to,overlap the outer surface oftheiring when I thelatter has'beenclosed.These flanges constitute one member of a clamp, the other member ofwhich is mounted within the cavityzl3 in the rear of the ring and ismanner, but ashere' shown it is actuated by a rod,,or shaft,i2 0connectedtherewith and, v having ascrew threaded portion 2lmountedadapted to be moved into. ,andfout of engagement with the ring}?As here shown, this second clamping member is in the form V of a; plate18 having a flange l9'adapted to engage there'ar surface of the ring.The flange l9 isof an internal 'diametersomewhat greater'than theinternal diameter of the closed ringso that whenin contact with the rinit willbe located a sufficient distance from the inner periphery thereofto avoid any; interference with the working or finishing? of thissurface. This second clamping member may be actuated in any suitableinia bushing 22'inserted'in the end of the V hollowspindle 6.-The shaftextends beyond the rear end of the spindle and maybe pro vided with ahand wheel'23, or other suitable means for rotating the same, as shownlIlFigJL j 1 f In using the chuck, the jawsnare first moved to theiropen positions and'a ring inserted in the cavity between the same, the r5-; 7 ring being supported byvthe lower-jaw, The

adjusting plate 12 then actuated to move the jaws inwardly and cause thesame, throughthe medium of the rollers, 15, to

compressthe ring. WVhen the ring has been closed the'clamping' member18is actuated and caused to engage the rear face of the ring andafo rcethesame against the front clamping member, or flanges, 17, thereby aliningthe ring and ,clamping the same rigidly against movement during the per-(i()' I formance of the work thereon. A tool is then inserted through[the opening formed .between the flanges 17-of the several jaws and.the. chuck and the ring are rotated to r cause the inner surface iof thering to be i finished in the usual manner. It will be understood, ofcourse, that the clluckinay,

moved relatively thereto. 1

While I have shown and described one he understood that'I do not desireto be limited embodiment of my invention I wish it to be to the detailsthereof as various modifications may occur toaiperson skilled in the iHaving now fully described my .invention what I claim as new and desireto secure by Letters Patent is:

if desired, remain Stationary and the tool be 1.- In a device of the:character described, v

a supporting. structure, compression 'members carried by said structureand having relatively small contact surfaces toengage i the periphery ofa split} ring, and compressv the same, said members having parts to engage one ofthe lateral faces of said ring, an annular member arrangedIto engage the other faceof said ring and clamp the same against saidparts ofpsaid members, 5 and means to actuate said" annular member.

, ,2. In a device forholding 'splitflringspa supporting structure, aplurality of jaws movably mounted on said structure and hav 7 ing partsto engage theperiphery ofa splitring, means for act'uating said jaws tocause them tocompress said ring, clamplng members-carried by therespective jaws to ,en- 7 gage one face of said ring, a clamping mem-iber to, engage the other, face of said ring, and means mounted foraxial, movement'rel'atives ly to said structure to actuate the lastmentioned clamping member. 1 g f 1 3. In a device of thecharacter'described, a

supporting structure, a 'plurality ofjaws; mounted for radial movementon said struc- .ture', each of said jawshaving'a'partextend-' betweenthem and having inwardly exten ing flanges at, their forward edges,means for actuating said jaws, anannular clamping memberarranged to therear of said flanges, and meansfor actuating said clamping member tocause it to engage a ring and clamp the same against said flanges. I 5.:In a device of'thecharacter described, supporting structure, aplurality of jaws movably mounted on said structure and each having apart projecting forwardly therefrom, said parts being arranged toform' aa near its forward edge an inwardly extending flange, a roller mounted111 each aw and having the inner portion of its periphery extendingbeyond the Wall of said cavity but I spaced from the inner edge of saidflange,

means for actuating said jaws, a clamping member mounted in said cavityand having an annular flange, and means for actuating said clampingmember to cause said flangeto engage aring mounted. in'saidcayity and,clamp the same against said flanges.

hereto.

' JOHNIEMORGAL. V I

In testimony whereof, aflix signature I

